Concrete crusher



FIG. 1 is a perspective view of a concrete crusher showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a is a rear view thereof;

FIG. 4 is right-side view thereof, the left-side view being a mirror image;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a sectional view thereof taken along line 7--7 in FIG. 2. 

The ornamental design for a concrete crusher, as shown and described. 